20101212210 has 16 divisors (see below), whose sum is σ = 48242909376. Its totient is φ = 5360323248.

The previous prime is 20101212191. The next prime is 20101212211. The reversal of 20101212210 is 1221210102.

It is a super-2 number, since 2×20101212210² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20101212211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335020174 + ... + 335020233.

It is an arithmetic number, because the mean of its divisors is an integer number (3015181836).

Almost surely, 2^20101212210 is an apocalyptic number.

20101212210 is an abundant number, since it is smaller than the sum of its proper divisors (28141697166).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20101212210 is a wasteful number, since it uses less digits than its factorization.

20101212210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670040417.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20101212210 its reverse (1221210102), we get a palindrome (21322422312).

The spelling of 20101212210 in words is "twenty billion, one hundred one million, two hundred twelve thousand, two hundred ten".